This standard BS EN ISO 8748:2007 Spring-type straight pins. Coiled, heavy duty is classified in these ICS categories:
21.060.50 Pins, nails
This International Standard specifies the characteristics of coiled heavy duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter, d1, from 1,5 mm to 20 mm inclusive.
NOTE Spring-type straight pins, coiled, standard duty, and spring-type straight pins, coiled, light duty, are the subjects of ISO 8750 and ISO 8751, respectively.